News International chief executive Tom Mockridge is to quit his role at the end of the month, News Corporation has announced.
Mockridge, who took over the position in July 2011, is stepping down to "pursue outside opportunities".
More top news
The Republican nominee said that "all she wants to do is campaign" before accusing Mrs Obama of attacking Hillary Clinton.
26 people injured and five people were taken to hospital after a bus crashed into a railway bridge.
Trinity Gay was shot dead in a car park outside a restaurant on Sunday following reports of an exchange of gunfire between two vehicles.